qapi/hmp: use 'backend' instead of 'device' with memory backend

fixup documentation comments and HMP message/help text

Signed-off-by: Igor Mammedov <imammedo@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
Acked-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>




diff --git a/hmp.c b/hmp.c
index 41006f5..e183a79 100644
--- a/hmp.c
+++ b/hmp.c
@@ -1692,7 +1692,7 @@
         ov = string_output_visitor_new(false);
         visit_type_uint16List(string_output_get_visitor(ov),
                               &m->value->host_nodes, NULL, NULL);
-        monitor_printf(mon, "memory device %d\n", i);
+        monitor_printf(mon, "memory backend: %d\n", i);
         monitor_printf(mon, "  size:  %" PRId64 "\n", m->value->size);
         monitor_printf(mon, "  merge: %s\n",
                        m->value->merge ? "true" : "false");